Building Services I

Lighting has a big impact on the rooms in your house or the work spaces in your office. A beautiful room can look bad because of bad lighting and an ugly space can get a much better look thanks to quality lighting. “ Lighting plays such an integral part in collaborative spaces,” observes Jennifer Woofter, president of Strategic Sustainability Consulting. Good lighting in building can bring positive effects that may be of importance to quality of life and which can affect comfort, productivity, and even human health. While, poor lighting can increase anxiety and may lead to trip and fall accidents if people cannot make sense of what is ahead of them. Besides,  lighting in is reported to consume as much as 21% of the total energy use in buildings (Levine et al., 2007), and to account for about 17.5% of global electricity use (Pike Research, 2010).   Therefore, we must not underestimate its value and take the time to have an eye for energy efficiency in a lighting...

   (A) Principle of electricity 1.       Atomic Theory   ·          An atom is made up of protons (+ charge), neutrons (no charge) and electrons (- charge)  ·          If an atom has the same number of electrons and protons, it will be balanced and have a neutral charge.  ·          If an atom has more than one electrons than protons, it will be unbalanced and will be negatively charged. ·          If an atom has more protons than electrons, it will be positive charged 2.Electron flow   ·          A length of electrons from each atom forced out of their orbit.   ·          These electrons capable of moving to another atom.   ·  ...